Placenta.
Placenta.
Placenta.
Placenta (Apex)
The protective structure that forms around a human embryo is called the amniotic sac or amnion. This sac contains amniotic fluid, which cushions and protects the developing embryo during pregnancy.
Amniotic membrane or amniotic sac, containing the embryo and amniotic fluid.
The cotyledon protects the embryo
The amniotic sac is the sac in which the fetus develops in amniotes. Its wall is the amnion, the inner of the two fetal membranes. It encloses the amniotic cavity and the embryo.
This is called the zygote. As it divides, it forms the embryo.
neurilemma
The membrane that forms a sac around an animal embryo is called the amniotic sac. The embryonic sac is a bag of fluid inside of a woman's womb where the unborn baby develops and grows.
The structure that forms a protective layer rich in glycoproteins on the surface of cells is the glycocalyx. It helps in cell-to-cell recognition, protection from mechanical stress, and acts as a barrier against pathogens.
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